Technical specialists are still investigating to see if it really is from the MH370, the Malaysia Airlines plane that went missing on March 8, 2014, with 239 people onboard.
The piece of debris was found just off the coast in Tanzania on June 23rd, and has been handed over for probe. Australia is leading the search for MH370 and have so far inspected four pieces of debris and determined them to be “almost certainly from MH370”.
[Source]